<div class="content">
  <div class="left">
    <!-- <a href="#">欢迎首页</a> -->
    <a [routerLink]="[ '/home/welcome']" routerLinkActive="active">欢迎首页</a>
    <br>
    <br>
    <a [routerLink]="[ '/home/settings']" routerLinkActive="active">系统设置</a>
    <br>
    <!-- <a href="#">系统设置</a> -->
  </div>

  <div class="right">
    <router-outlet></router-outlet>
  </div>
</div>
